"so thin it can give you a paper cut," if that's not an idea then you shouldn't say anything. Usually the dumbest people in advertising are the consumers but it seems like people in creative aren't much different. I can understand if you said it's not original, but to say there is "no idea" is dumb.

you know I realised sth, when a person says an ad is bad, the following few comments will say the samething, when one says it's good, the others follow...
so I wonder if they've really thought about what they've seen here.